Cooler for cream, milk, and other fluids.



`J. ocoNNELL 1 H. H. KERR.

COOLER FOR CREAM, MILK, AND OTHER FLUIDS.

APPLICATION FILED JULY 27 I9I4, l Patented Nov. 28, 1915.

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cuoco ESS 5 narran spawns rentrant prima JOSEPH OCONIIELL AND HAROLD HAMILTUN OF KENSINGTGN, VICTORIA, AUSTRALIA.

COOLER FOR CREAM, MILK, ND OTHER FLUIDS.

Application filed. July 27, 1914.

To all wiz/0m t may concern Be it known that we, Josnrn. GCONNELL and HAROLD HAMILTON linnn, subjects of the King of Great Britain, residing at Macaulay Road, Kensington, in the irl-tate of Victoria, Australia, have invented certain new and useful improvements in Coolers for Cream, Milla-and other Fluids;` and we do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which -it appertains to make and use the same.

rlhis invention has been devised to provide improved means by which cream in particular, or milk, beer and other liquids may be more eiciently and economically cooled than previously.

ln order that our invention may be the more easily understood, reference may be made to the accompanying drawings, in whichlfigure l is an elevation of a complete cooler embodying our invention. Fig. 2 is a section of portion of same showing the internal arrangements of pipes and ports, .vliile Fig. 3 shows in vertical elevation the shield or squeezing plates for the outer copper sleeve tubes.

ln these drawings t and a represent two vertical standards, the one ct being placed at some distance from the other a and each having a curved top at t2 to receive a trough o, the latter being perforated at o to direct the cream, milla', etc., on to cooling` surfaces of the sleeves below, hereinafter to be explained. The bottom of such standards a and a are broadened out to form a base a3 and to hold a collecting trough c to receive the cream, or other liquid, after it vhas passed over the cooling surfaces of the sleeves a.

The standard. a is hollowed, and contains a number of tubular butt formations or heads e (see Fig. 2), which are threaded for receiving the ends of a plurality of circulation tubes f and g. At the top of the standard a is a threaded perforation f in which an inlet pipe f2 containing the refrigerating fluid is allowed to enter, and at a farther distance in such perforation is the first of the screw-threaded heads or butts e. ln this screw-threaded head or butt is screwed the front end of a longitudinal pipe f, the end of which is open near the closed-in end g of a pipe g of larger diameteri Specification of Letters Patent.

Patented Nov. 23, i915..

Serial No. 853,460.

@ne end of g isthreaded and screws into thebaclr of the standard a (as shown at g2). rlhe difference in diameter between the inner open-ended pipe f and the outer closedin pipe g allows a narrow annular passage Zito exist throughout practically the whole of the length of the outer pipe g, a sutlicient space e' only being allowed at the rearward 'end of the inner pipe f to enable the refrigrative fluid, on leaving such inner pipe f to escape and fill the annular passage ft on its'` flowing forward.

At the forward end of the outer pipe g and surrounding the forward portion of the inner pipe is an annular space communicating with a port y' enabling the fluid on leaving the annular space It between the pipes j! and g to flow downwardly to and enter the inner pipe 7 of a second construction similar in all respects to the double pipe construction hereinbefore explained, that is to say 'the refrigerative fluid, after having left the annulus in one set of pipes, enters a second set and on leaving the annulus of the second et, escapes by a downwardly opening port similar to j to the third set of pipes. This arrangement may be increased in number in accordance with the temperature required in the operation of the machine, Preferably, butv not necessarily, the succeeding lower set of pipes may be of slightly lessened diameter from the top set. ihe port it' of the bottom set communicates with an exit bottom pipe` l, in all general respects similar to the fluid inlet pipe hereinbefore referred to.

Referring to the standard a, the same is constructed preferably of a webbed casting m, its function being merely to support the trough l) above, hereinbefore referred to, and the closed ends g of each of the larger tubes g hereinbefore mentioned.

The tubes f and g aforesaid may be constructed of ordinary black iron, and around each of the outer tubes g we place a loosely fitting tinned copper sleeve tube n, its function being to reduce the intensity of the lowness of temperature of the outer iron tube g, and thus prevent freezing of the cream or other liquid upon the upper series of such tubes, that would otherwise take place, and does take place at present where the cream, or other liquid, flows directly upon a pipe in immediate contact with refrigerating fluid. The ends of the tinned copper sleeve tubes n are provided with exterior shield or squeezing plates 0, which contain semi-circular openings 79 (see Fig. 3), so that when brought together by screw bolts 79 they close tightly around the ends of such tinned tubes n and prevent any cream or other liquid entering between such outer tinned copper sleeve tubes and the iron pipe g within.

ln practice expanded ammonia or other refrigerative fluid, under a moderate pressure,enters by the top inlet pipe f, thence a short distance through the casting of a and enters the front end of the first of the interior pipes f, passes along through same to its open end and thence lls the recess t' in the back end of the exterior pipe g, and travels along in the annular opening 7L again toward the standard a and enters the passage or port j, meanwhile chilling the exterior pipe g. The refrigerative iuid then enters the inner tube f of the next or lower series or" pipes, where its travel is repeated inthe -manner last aforesaid. Meanwhile the outside tinned copper sleeve n, is chilled by being in proximity to the outer iron tube g, but will not be chilled to the same degree as such exterior iron pipe g, and the cream or other liquid pouring down over the surface of the said copper sleeves a is gradually robbed of its heat. A circulation of the refrigerative luid'is maintained throughout the apparatus during the whole period of its Working, while the cooled cream or liquid is received in the collecting trough c from whence it is drawn away as required.

lt is obvious that the refrigerative fluid may, if desired, circulate in the reverse manner to that herein described, t'. e. up through the pipes in lieu of the downward circulation.

1. Cooling rapparatus for fluids, comprising a series of horizontal, superposed, outer pipes open at their front ends and closed at 'l their rear ends, a series of inner pipes, open at both ends, arranged within the outer pipes so as to form annular spaces therewith and having their rear ends spaced from the closed ends of the outer pipes, means for supporting said inner and outer pipes, passages connecting each of said annular spaces with the front end of the inner pipe next below, inlet and outlet passages for admitting a refrigerating fluid and drawing same off after it has passed through the series of pipes, a collecting trough arranged below the bottom pipes, and sleeves surrounding said outer pipes and loosely fitting the same, whereby the fluid to be cooled is prevented from freezing, substantially as described.

2. Cooling apparatus for iuids, comprising a series of horizontal, superposed, outer pipes open at their front ends and closed at their rear ends, a series of inner pipes, open at both ends, arranged within the outer pipes so as to form annular spaces there-A with and having their rear ends spaced from the closed ends of the outer pipes, means 'for supporting said inner and outer' pipes, passages connecting each of said annular spaces with the front end of the inner pipe next below, inlet and outlet passages for admitting a refrigerating iiuid and drawing same oii after it has passed through the series of pipes, a collecting trough arranged below the bottom pipes, sleeves surrounding said outer pipes and loosely fitting the same so as to prevent` freezing of the fluid to be cooled, and shields arranged at the ends of the said sleeves for preventing the fluid to be cooled from entering between the sleeves and the outer pipes, substantially as described.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

JQSEPH OCONNELL. HAROLD HAMILTON KERR. Witnesses AUGUSTINE T. MADDEN, ALICE HARKER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. C. 

